Updated: 2022/Sep/29

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EVP_sha3_224(3)                     OpenSSL                    EVP_sha3_224(3)



NAME
       EVP_sha3_224, EVP_sha3_256, EVP_sha3_384, EVP_sha3_512, EVP_shake128,
       EVP_shake256 - SHA-3 For EVP

LIBRARY
       libcrypto, -lcrypto

SYNOPSIS
        #include <openssl/evp.h>

        const EVP_MD *EVP_sha3_224(void);
        const EVP_MD *EVP_sha3_256(void);
        const EVP_MD *EVP_sha3_384(void);
        const EVP_MD *EVP_sha3_512(void);

        const EVP_MD *EVP_shake128(void);
        const EVP_MD *EVP_shake256(void);

DESCRIPTION
       SHA-3 (Secure Hash Algorithm 3) is a family of cryptographic hash
       functions standardized in NIST FIPS 202, first published in 2015. It is
       based on the Keccak algorithm.

       EVP_sha3_224(), EVP_sha3_256(), EVP_sha3_384(), EVP_sha3_512()
           The SHA-3 SHA-3-224, SHA-3-256, SHA-3-384, and SHA-3-512 algorithms
           respectively. They produce 224, 256, 384 and 512 bits of output
           from a given input.

       EVP_shake128(), EVP_shake256()
           The SHAKE-128 and SHAKE-256 Extendable Output Functions (XOF) that
           can generate a variable hash length.

           Specifically, EVP_shake128 provides an overall security of 128
           bits, while EVP_shake256 provides that of 256 bits.

NOTES
       Developers should be aware of the negative performance implications of
       calling these functions multiple times and should consider using
       EVP_MD_fetch(3) with EVP_MD-SHA3(7) or EVP_MD-SHAKE(7) instead.  See
       "Performance" in crypto(7) for further information.

RETURN VALUES
       These functions return a EVP_MD structure that contains the
       implementation of the message digest. See EVP_MD_meth_new(3) for
       details of the EVP_MD structure.

CONFORMING TO
       NIST FIPS 202.

SEE ALSO
       evp(7), EVP_DigestInit(3)

COPYRIGHT
       Copyright 2017-2023 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use
       this file except in compliance with the License.  You can obtain a copy
       in the file LICENSE in the source distribution or at
       <https://www.openssl.org/source/license.html>.



3.0.12                            2023-10-25                   EVP_sha3_224(3)